Hadoop NameNode info (HADOOP_NAMENODE_INFO)

This application class contains attributes that display the NameNode information. The Hadoop KM gathers these metrics by executing the following query:

<NameNode jmx url>?qry=Hadoop:service=NameNode,name=NameNodeInfo

where,

<NameNode jmx url> is the Java Management Extensions url, http://<<NameNode host name>>:<<NameNode port>>/jmx

qry is Hadoop by default

service contains the type of the group, for example, DataNode, ResourceManager, JobTracker, ResourceManager, TaskTracker and other available groups

name contains the type of metrics data you want to collect and display, for example, JVMmetrics, Queuemetrics, RPCactivity and other available metrics types

Application class attributes

Attributes (parameters)

• Block pool used space (BlockPoolUsedSpace)
• Cache capacity (CacheCapacity)
• Cache used (CacheUsed)
• Distinct version count (DistinctVersionCount)
• Free
• Non dfs used space (NonDfsUsedSpace)
• Number of missing blocks (NumberOfMissingBlocks)
• Percent block pool used (PercentBlockPoolUsed)
• Percent remaining (PercentRemaining)
• Percent used (PercentUsed)
• Threads
• Total
• Total blocks (TotalBlocks)
• Total files (TotalFiles)
• Used